- Ignition switch ACC
- Sound is input to the microphone amplifier assembly when the user is closer than 125 mm from the microphone amplifier assembly sound holes in the roof headlining holder cover.
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018QZ0 |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - 08/2018] |
| Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Microphone Circuit; 2018 MY Sienna [11/2017 - 08/2018] | ||
|
Microphone Circuit |
DESCRIPTION
-
w/o Manual (SOS) Switch:
The radio and display receiver assembly, roof console box sub-assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines.
Using this circuit, the radio and display receiver assembly sends power to the roof console box sub-assembly and telephone microphone assembly, and the roof console box sub-assembly and telephone microphone assembly sends microphone signals to the radio and display receiver assembly.
-
w/ Manual (SOS) Switch:
The radio and display receiver assembly, roof console box sub-assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines.
Using this circuit, the DCM (telematics transceiver) sends power to the roof console box sub-assembly and telephone microphone assembly, and the roof console box sub-assembly and telephone microphone assembly sends microphone signals to the radio and display receiver assembly via the DCM (telematics transceiver).
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
- A communication malfunction DTC is stored.
- The radio and display receiver assembly may not operate normally.
-
Before replacing the DCM (telematics transceiver), refer to Registration.
Click here
![2018 - 2020 MY Sienna [11/2017 - ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: DCM ACTIVATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO NAVIGATION ECU) |
|
(a) Enter the "Microphone Check" screen. Refer to Check Microphone (Input to navigation ECU) in Operation Check. |
|
(b) When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
OK:
Check result is normal.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
|
2. |
CHECK MICROPHONE AND VOICE RECOGNITION (INPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) |
|
(a) Enter the "Microphone Check" screen. Refer to Check Microphone (Input to radio and display receiver assembly) in Operation Check. Click here
|
|
(b) When voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
OK:
Check result is normal.
|
Result |
Proceed to |
|---|---|
|
NG (w/o Manual (SOS) Switch) |
A |
|
NG (w/ Manual (SOS) Switch) |
B |
|
OK |
C |
| B |
|
| C |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MICROPHONE AMPLIFIER ASSEMBLY) |
(a) Disconnect the D196 radio and display receiver assembly connector.
(b) Disconnect the T29 microphone amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D196-25 (SNS2) - T29-4 (SNS2) |
Always |
Below 1 Ω |
|
D196-23 (MACC) - T29-1 (MACC) |
Always |
Below 1 Ω |
|
D196-21 (MIN+) - T29-2 (MIC+) |
Always |
Below 1 Ω |
|
D196-22 (MIN-) - T29-3 (MIC-) |
Always |
Below 1 Ω |
|
D196-25 (SNS2) - Body ground |
Always |
10 kΩ or higher |
|
D196-23 (MACC) - Body ground |
Always |
10 kΩ or higher |
|
D196-21 (MIN+) - Body ground |
Always |
10 kΩ or higher |
|
D196-22 (MIN-) - Body ground |
Always |
10 kΩ or higher |
|
D196-24 (SGND) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY |
(a) Remove the radio and display receiver assembly with the connector(s) still connected.
|
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D196-22 (MIN-) - Body ground |
Always |
Below 1 Ω |
|
D196-24 (SGND) - Body ground |
Always |
Below 1 Ω |
| NG |
|
|
|
5. |
CHECK MICROPHONE AMPLIFIER ASSEMBLY (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Check the output waveform.
|
(1) Remove the microphone amplifier assembly with the connector(s) still connected. Click here
|
|
(2) Connect an oscilloscope to terminal T29-2 (MIC+) and T29-3 (MIC-).
(3) Turn the ignition switch ACC.
(4) Sound is input to the microphone amplifier assembly when the user is closer than 125 mm from the microphone amplifier assembly sound holes in the roof headlining holder cover.
(5) Check the signal waveform according to the condition(s) in the table below.
|
Item |
Condition |
|---|---|
|
Measurement terminal |
T29-2 (MIC+) - T29-3 (MIC-) |
|
Tool setting |
50 mV/DIV., 500 ms/DIV. |
|
Vehicle condition |
|
OK:
The waveform is similar to that shown in the illustration.
HINT:
The oscilloscope waveform shown in the illustration is an example for reference only.
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG |
|
|
6. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - ROOF CONSOLE BOX SUB-ASSEMBLY) |
(a) Disconnect the D196 radio and display receiver assembly connector.
(b) Disconnect the T29 microphone amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D196-25 (SNS2) - T29-4 (SNS2) |
Always |
Below 1 Ω |
|
D196-25 (SNS2) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
7. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the D196 radio and display receiver assembly connector.
(b) Disconnect the D73 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D196-21 (MIN+) - D73-18 (MCO+) |
Always |
Below 1 Ω |
|
D196-22 (MIN-) - D73-19 (MCO-) |
Always |
Below 1 Ω |
|
D196-21 (MIN+) - Body ground |
Always |
10 kΩ or higher |
|
D196-22 (MIN-) - Body ground |
Always |
10 kΩ or higher |
|
D196-24 (SGND) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK HARNESS AND CONNECTOR |
(a) Disconnect the D73 DCM (telematics transceiver) connector.
(b) Disconnect the T29 microphone amplifier assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D73-33 (MCVD) - T29-1 (MACC) |
Always |
Below 1 Ω |
|
D73-34 (MCI+) - T29-2 (MIC+) |
Always |
Below 1 Ω |
|
D73-35 (MCI-) - T29-3 (MIC-) |
Always |
Below 1 Ω |
|
D73-33 (MCVD) - Body ground |
Always |
10 kΩ or higher |
|
D73-34 (MCI+) - Body ground |
Always |
10 kΩ or higher |
|
D73-35 (MCI-) - Body ground |
Always |
10 kΩ or higher |
|
D73-32 (SGND) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
9. |
CHECK DCM (TELEMATICS TRANSCEIVER) |
|
(a) Remove the DCM (telematics transceiver) with the connector(s) still connected. Click here
|
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
D73-33 (MCVD) - Body ground |
Ignition switch ACC |
4 to 6 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D73-32 (SGND) - Body ground |
Always |
Below 1 Ω |
|
D73-35 (MCI-) - Body ground |
Always |
Below 1 Ω |
| NG |
|
|
|
10. |
CHECK MICROPHONE AMPLIFIER ASSEMBLY (OUTPUT TO DCM (TELEMATICS TRANSCEIVER)) |
(a) Check the output waveform.
|
(1) Remove the microphone amplifier assembly with the connector(s) still connected. Click here
|
|
(2) Connect an oscilloscope to terminal T29-2 (MIC+) and T29-3 (MIC-).
(3) Turn the ignition switch ACC.
(4) Sound is input to the microphone amplifier assembly when the user is closer than 125 mm from the microphone amplifier assembly sound holes in the roof headlining holder cover.
(5) Check the signal waveform according to the condition(s) in the table below.
|
Item |
Condition |
|---|---|
|
Measurement terminal |
T29-2 (MIC+) - T29-3 (MIC-) |
|
Tool setting |
50 mV/DIV., 500 ms/DIV. |
|
Vehicle condition |
|
OK:
The waveform is similar to that shown in the illustration.
HINT:
The oscilloscope waveform shown in the illustration is an example for reference only.
| NG |
|
|
|
11. |
CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Check the output waveform.
|
(1) Remove the DCM (telematics transceiver) with the connector(s) still connected. Click here
|
|
(2) Connect an oscilloscope to terminal D73-18 (MCO+) and D73-19 (MCO-).
(3) Turn the ignition switch ACC.
(4) Sound is input to the microphone amplifier assembly when the user is closer than 125 mm from the microphone amplifier assembly sound holes in the roof headlining holder cover.
(5) Check the signal waveform according to the condition(s) in the table below.
|
Item |
Condition |
|---|---|
|
Measurement terminal |
D73-18 (MCO+) - D73-19 (MCO-) |
|
Tool setting |
50 mV/DIV., 500 ms/DIV. |
|
Vehicle condition |
|
OK:
The waveform is similar to that shown in the illustration.
HINT:
The oscilloscope waveform shown in the illustration is an example for reference only.
| OK |
|
| NG |
|
|
12. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU) |
(a) Disconnect the D197 radio and display receiver assembly connector.
(b) Disconnect the D199 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D197-25 (MCO+) - D199-13 (MIC+) |
Always |
Below 1 Ω |
|
D197-26 (MCO-) - D199-14 (MIC-) |
Always |
Below 1 Ω |
|
D197-25 (MCO+) or D199-13 (MIC+) - Body ground |
Always |
10 kΩ or higher |
|
D197-26 (MCO-) or D199-14 (MIC-) - Body ground |
Always |
10 kΩ or higher |
|
D197-24 (SGND) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
13. |
CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY (OUTPUT TO NAVIGATION ECU) |
(a) Disconnect the D199 navigation ECU connector.
(b) Turn the ignition switch ACC.
|
(c) Check the signal waveform according to the condition(s) in the table below.
OK: The waveform is similar to that shown in the illustration. HINT: The oscilloscope waveform shown in the illustration is an example for reference only. |
|
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG |
|
|
|